One vertex per element, one color per generator, with an edge from x to x·s.
(10,13)(14,16)(17,18,23,22)(19,28,31,24)(20,25,30,26)(21,27,29,32)(1,2)(3,6)(4,7)(5,8)(11,15)(14,16)(17,19)(18,24)(20,29)(21,30)(22,28)(23,31)(25,27)(26,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,20,23,30)(18,25,22,26)(19,29,31,21)(24,27,28,32)(3,8)(5,6)(17,20)(18,26)(19,29)(21,31)(22,25)(23,30)(24,32)(27,28) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,11,12,15)(10,14,13,16)(17,21,23,29)(18,27,22,32)(19,30,31,20)(24,25,28,26)(1,2)(3,6)(4,7)(5,8)(9,10)(11,14)(12,13)(15,16)(17,22,23,18)(19,28,31,24)(20,25,30,26)(21,32,29,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.